Also, a suggestion. OP should edit the OP to add FAQs. Also, the firmware compatibilities on the OP need to be updated. Gateway firmware works on 3DS firmware up to 9.2 now, right? And then there is also the newer Flash card, Sky3DS. That, according to its site, already supports the latest 3DS firmwares.
Edit: The tutorial video on the OP is for using Cyber Editor, but since Cyber Editor is currently Japan only, I think more players need help knowing how to use the rom+flashcard methods. Which leads me to another question. How does Datel work with encrypted saves?